Light stick



FIG. 1 is a diagrammatic perspective view of a light stick.

FIG. 2 is a front elevational view of the light stick.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a left side elevational view thereof, the right side elevational view being a mirror image of the left side view.

FIG. 5 is a top plan view of the light stick; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a light stick, as shown and described. 